Either your belt has stretched beyond its specs or you have larger problems. Are you talking about a new belt? If not, try a new belt. If so, check to make sure the beater bar will spin freely without a belt attached. If it spins without a belt attached, make sure the bearing blocks at both ends are in good shape.

Yes. Under the front handle yoke. The “no spray” is caused by a build up of soap from the wire. You might have to clean out the spray tubes on the bottom. Try running warm water with no soap after cleaning.